Mockito簡(jiǎn)介

??? 呼叫mock物件的方法時(shí)，不會(huì)執(zhí)行真實(shí)的方法，而是傳回類型的預(yù)設(shè)值，如object回傳null, int回傳0等，否則透過(guò)指定when (方法).thenReturn(value)來(lái)指定方法的回傳值。同時(shí)mock物件可以進(jìn)行追蹤，使用verify方法看是否已經(jīng)被呼叫過(guò)。而spy對(duì)象，預(yù)設(shè)會(huì)執(zhí)行真實(shí)方法，返回值可以透過(guò)when.thenReturn進(jìn)行覆寫。可見mock只要避開了執(zhí)行一些方法，直接回傳指定的值，方便做其他測(cè)試。

Service測(cè)試案例

需要的依賴

??<dependency>
????????????<groupId>junit</groupId>
????????????<artifactId>junit</artifactId>
????????????<version>4.12</version>
????????????<scope>test</scope>
????????</dependency>
????????<dependency>
????????????<groupId>org.mockito</groupId>
????????????<artifactId>mockito-core</artifactId>
????????????<version>2.23.4</version>
????????????<scope>test</scope>
????????</dependency>
????????<dependency>
????????????<groupId>org.springframework.boot</groupId>
????????????<artifactId>spring-boot-test</artifactId>
????????????<version>2.1.13.RELEASE</version>
????????</dependency>

程式碼範(fàn)例

@RunWith(MockitoJUnitRunner.class)
@SpringBootTest()
public?class?StudentServiceTest?{
????@InjectMocks
????StudentService?studentService?=?new?StudentServiceImpl();
????@Mock
????StudentDAO?????studentDAO;


????@Before
????public?void?before(){
????????Mockito.doReturn(new?StudentDO("張三",?18)).when(studentDAO).read(Mockito.anyString());
????}

????@Test
????public?void?testRead(){
????????StudentDO?read?=?studentService.read("");
????????Assert.assertNotNull(read);
????}
}

Controller測(cè)試案例

需要的依賴

<dependency>
????????????<groupId>org.springframework</groupId>
????????????<artifactId>spring-test</artifactId>
????????????<version>5.1.14.RELEASE</version>
????????</dependency>
????????<dependency>
????????????<groupId>com.jayway.jsonpath</groupId>
????????????<artifactId>json-path</artifactId>
????????????<version>2.4.0</version>
????????</dependency>

程式碼範(fàn)例

@RunWith(MockitoJUnitRunner.class)
@SpringBootTest()
public?class?StudentControllerTest?{
????@Resource
????MockMvc?mockMvc;

????@InjectMocks
????StudentController?studentController;
????@Mock
????StudentService????studentService;

????@Before
????public?void?before()?{
????????mockMvc?=?MockMvcBuilders.standaloneSetup(studentController).build();
????????Mockito.doReturn(new?StudentDO("張三",?18)).when(studentService).read(Mockito.anyString());
????}

????@Test
????public?void?testRead()?throws?Exception?{
????????MockHttpServletRequestBuilder?request?=?MockMvcRequestBuilders.get("/student/read/1");
????????mockMvc.perform(request)
????????????????.andDo(print())
????????????????.andExpect(status().isOk())
????????????????.andExpect(jsonPath("$.name").value("張三"));
????}

}

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